Another Saturday, Another Shower for Jamie Lynn

This weekend brought a Mother's Day celebration for a mom-to-be – the second baby shower in a week for Jamie Lynn Spears.

Glammed up in a bright print dress and yellow heels, the expectant Spears, 17, gassed up her Range Rover on Saturday and headed to Liberty, Miss, where friends threw an early-evening event attended by "30 or 40 people," a source tells PEOPLE.

While the baby's father, Casey Aldridge, did not put in an appearance, his mom Joyce and sister Ashley were both in attendance. Other than immediate family, "it was a totally different group" from the first event, explained the source. "This one was more [Casey's] family."

After the "really nice" shower, the guests – including the mom-to-be – went out to dinner and then on to a club, the source added.

May will bring even more showers for Jamie Lynn: The Aldridge family is planning to host a bash as well.